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Finding the Fourth Proportional to 78,139.56, 107,839.26 and 44,154.30

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Solution

The fourth proportional to 78,139.56, 107,839.26 and 44,154.30 is: 60,936.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,139.56 : 107,839.26 = 44,154.30 : x
  2. Step 2: Convert to fraction form
    78,139.56/107,839.26 = 44,154.30/x
  3. Step 3: Cross multiply
    78,139.56x = 107,839.26 × 44,154.30
  4. Step 4: Simplify right side
    78,139.56x = 4,761,567,037.82
  5. Step 5: Solve for x
    x = 4,761,567,037.82/78,139.56
  6. Step 6: Final answer
    x = 60,936.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.